Lebanon recognizes 18 distinct religious sects under its political system, established formally during the French Mandate period between 1920 and 1943. The National Pact of 1943 codified an unwritten power-sharing arrangement that allocates the presidency to a Maronite Christian, the prime ministership to a Sunni Muslim, and the speaker of parliament position to a Shia Muslim. This confessional system extends into parliamentary seat distribution, civil service appointments, and military command structures. The 1989 Taif Agreement, which ended the Lebanese Civil War, adjusted the Christian-Muslim parliamentary balance from 6:5 to equal representation at 64 seats each, while maintaining sectarian allocations within these blocs. No official census has been conducted since 1932, partly because demographic shifts could destabilize the confessional balance. Current estimates place the population at approximately 40 percent Shia Muslim, 27 percent Sunni Muslim, 21 percent Maronite Christian, 8 percent Greek Orthodox, and 5 percent Druze, though these figures remain disputed and politically sensitive.
Maronite Christians trace their origins to Saint Maroun, a fourth-century hermit in Syria whose followers established monasteries in the Qadisha Valley by the seventh century. The Maronite Church maintains full communion with Rome while preserving its own patriarchate, liturgical language (Aramaic alongside Arabic), and married clergy at the priesthood level. Our Lady of Lebanon in Harissa, inaugurated in 1908, stands 15 tons of bronze atop a sanctuary built by French resources, marking the physical and symbolic center of Maronite identity. The statue faces Beirut at 650 meters elevation, visible from the capital's coastal districts. Saint Charbel Makhlouf, who died at the Annaya monastery in 1898, was canonized by Pope Paul VI in 1977 after the Vatican documented medical recoveries attributed to his intercession. His tomb at Annaya draws approximately one million pilgrims annually, both Christian and Muslim, who petition for healing. The Qadisha Valley holds 34 monasteries carved into cliff faces between the 10th and 18th centuries, when Maronites used these remote locations to preserve manuscripts and liturgical traditions during periods of persecution. Deir Qannoubin served as the patriarchal seat from 1440 to 1790. Sunday mass attendance among Maronites remains above 60 percent in mountain villages of Keserwan District and the Chouf, compared to approximately 30 percent in Beirut suburbs.
Sunni Muslims constitute the largest urban population, concentrated in Tripoli, Beirut, and Sidon. The Mohammad Al-Amin Mosque in Beirut, completed in 2008 with funding from former Prime Minister Rafic Hariri's foundation, occupies 11,000 square meters in Martyrs' Square with four minarets reaching 65 meters. Its Ottoman-influenced blue dome references Istanbul's Sultan Ahmed Mosque. Friday prayer congregations at Al-Amin regularly exceed 3,000 attendees. Dar al-Fatwa in Beirut serves as the administrative seat of the Grand Mufti, who issues religious rulings and oversees Sharia courts handling personal status matters for Sunni citizens. These courts hold exclusive jurisdiction over marriage, divorce, inheritance, and custody cases within the community. Tripoli hosts the largest concentration of Sunni madrasas in Lebanon, including the Abu Samra cultural complex where Quranic memorization programs begin at age five. Ramadan observance in Sunni-majority neighborhoods involves pre-dawn suhoor meals sold from street carts in Tariq al-Jadeede and iftar cannons fired at sunset from the Tripoli citadel. Eid al-Fitr typically sees family gatherings where ma'amoul cookies filled with dates or walnuts are prepared in quantities exceeding 200 pieces per household.
Shia Muslims concentrate in southern Lebanon, the Beqaa Valley, and Beirut's southern suburbs. The 1975-1990 civil war and the 1982 Israeli invasion of southern Lebanon accelerated Shia political organization through Hezbollah, established in 1985. The party operates a parallel governance structure providing healthcare through 12 hospitals, educational services via Al-Mahdi schools serving 18,000 students, and agricultural cooperatives in Baalbek and the south. Ashura commemorations marking the death of Imam Hussein in 680 CE draw the largest Shia gatherings, particularly in Nabatieh where the two-day event involves self-flagellation processions of approximately 50,000 participants and reenactments of the Battle of Karbala. The Sayyed Mohammad Hussein Fadlallah mosque in Haret Hreik, Beirut's southern suburbs, accommodates 5,000 worshippers and serves as a major Friday prayer venue where sermons are simultaneously translated into English and French for diaspora attendees. Personal status courts for Shia Lebanese operate under Jaafari jurisprudence, which differs from Sunni Hanafi law in matters of temporary marriage, inheritance shares for daughters, and divorce procedures. Arbaeen, occurring 40 days after Ashura, prompts pilgrimage caravans to Karbala in Iraq, with Lebanese Shia constituting an estimated 8 percent of the three million annual participants.
The Druze community numbers between 200,000 and 250,000, residing primarily in the Chouf District and Wadi al-Taym near the Syrian border. Druze religious practice remains closed to outsiders and even to the majority of Druze themselves, with religious knowledge restricted to the uqqal (initiated), who constitute roughly 10 percent of the community. The remaining juhal (uninitiated) participate in social and cultural aspects but are excluded from theology and scripture study. Khalwa houses serve as prayer and study centers for initiated men and women, who wear distinctive black garments and white head coverings. Druze religious law prohibits conversion either into or out of the faith, intermarriage with non-Druze, and polygamy. Beiteddine Palace in the Chouf, built by Emir Bashir Shihab II between 1788 and 1818, functioned as the administrative center of Mount Lebanon's semi-autonomous emirate until French mandate rule. The Chouf Cedar Reserve, established in 1996 across 550 square kilometers, holds significant Druze heritage as families maintained these forests through generations via communal protection agreements predating the modern state. Walid Jumblatt, leader of the Progressive Socialist Party since 1977, exercises de facto political leadership over the Druze community despite the party's secular orientation.
Greek Orthodox Christians, the second-largest Christian sect, follow the Antiochian Patriarchate based in Damascus. Saint George Orthodox Cathedral in Beirut, reconstructed after civil war damage in 1995, sits atop Byzantine-era foundations dated to the fifth century through archaeological excavations. The cathedral's iconostasis, installed in 2003, required 14 months to complete using traditional egg tempera techniques. Orthodox liturgy retains more Greek and Byzantine elements than Maronite practice, with Divine Liturgy conducted in Arabic but preserving Greek kyries and responses. Orthodox Christians observe Easter according to the Julian calendar, which typically places the holiday one to five weeks after Western Christian Easter, though both coincided in 2017 and will again in 2025. The Balamand Monastery near Tripoli, founded in 1157 by Cistercian monks and transferred to Greek Orthodox control in 1610, operates the University of Balamand, established in 1988 and enrolling 6,000 students across seven campuses. Iconography workshops at Balamand train artists in Byzantine techniques passed through apprenticeships requiring seven years to master egg tempera, gold leaf application, and canonical proportion systems. Orthodox Christians maintain significant populations in Beirut, Zahle, and Tripoli, with Zahle's Greek Orthodox community celebrating the feast of Our Lady of Zahle and Beqaa on August 15 with a procession carrying a 200-kilogram silver icon through the city.